Detection and Health Risk Assessment of Pesticide Residues in Commercially Available Black Tea
The primary objective of this study was to scrutinize the presence and levels of 65 pesticide residues in 160 black tea samples sourced from the Fujian market and conduct an assessment of the potential health risks associated with the con-sumption of these teas.The analysis included employing both gas chromatography-mass spectrometry and liquid chromatog-raphy-mass spectrometry to detect and quantify pesticide residues,with evaluations based on the"National Food Safety Stan-dard-Maximum Residue Limits of Pesticides in Food"(GB 2763-2021).The results revealed that out of the 65 known pesti-cide residues,28 were detected in the tea samples.Among the 160 samples examined,115 were found to contain pesticide residues,resulting in a detection rate of 71.87%,all of which were lower than the national maximum residue limit,and a 100%pass rate was reached.Notably,the pesticides most frequently detected included dinotefuran(60.63%),pyramiprid(58.13%),imidacloprid(50%),difenthiuron(48.75%),acetamiprid(39.38%),thiamethoxam(25.63%),and bifenthrin(20%).Further-more,according to an acute and chronic risk entropy study of pesticide residues,the computed hazard quotient(HQ)values were substantially below the critical threshold of 100,indicating that pesticide residues in tea does not represent a significant health threat for consumers.However,notably,the acute hazard index(aHI)for pyrimidines reached 31.5%of the acute ref-erence level,signifying the acute dietary risk should be noted.
black teapesticide residuegas chromatography-mass spectrometryliquid chromatography-mass spectrometryrisk assessment
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